Boiler safety device.



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Specification oi ,I

. `A Appl'ieefsoii sied iugm 2 8, 190s, sei-iel-Nmfmo @wird member19,1998, serial No. 348.625.

@allotment/mme' Beit knownthat GEORGE E. Wrnrirny,"a citizen of theUnited States, residing at Bridgeport, vin the county of Fairfield, itheState of Connecticut, have invented an Improvement in Boiler SafetyDevices,

I oi which` the following description,v in connection with theaccompanyingl drawings, is a. specification, like letters on thedrawings representing like parts. i

My invention comprises anA iinproved safety device for steam generatorsintended to protect such genomtors from the injurious effect of afailure in water supply and is particularly; though not exclusively,useful in boilers such as are employed on automobiles and the Myinvention will be best understood from a description of one embodimentthereof.

Referring to the drawings,-Figure l is a side elevation of a boilerfitted with one embodiment of my in vention; Fig. 2 `is a rear elevationof the same;-Fig. 3

is a plan view in partial section; and, Fig. 4'is a detail.

l In sie drawings A is e boiler which vmay be of 'any construction, butwhich is here represented of theconventional type ordinarily employedupon automobiles. Into the side of the boiler by'suitable connections issecured a pipe a, to connect with the water space thereof, and atanother point upon the boiler side, but at a level Soinewhat above theentrance of the pipe a is another suitable connection b', also with thewater space of the boiler and leading to a downwardly eritended pipe c.Beneath the boiler is provided any suitable lsource of combustion, suchas a hydrofcarbon burner, B, through the interior of the casing ofwhich, so as to be exposed to the heat of the combustion therein, is thepipe d, having outward lateral connections through the burner casingwith the two downwardly extended pipes, `a and c, so that-the said pipesa, c, d, constitute in effect a ferent levels and exposed fora portionof its lengthto the heat of combustion applied to the boiler. So long` iwater space of the boiler.

Acontrolled by the hand valve g..

'.The pipe d at a suitable location in its length, is pro. vvided with afusible wall, -suchas the plug. e, Fig.` 3,'of tin `or other-,fusiblemetal,'normally closing an outlet `conduit: connecting the water spaceofthe bolier at diffrom the conduit of which d formes. part,sur'rh'out-let `beingprovided by the pipe f, leading tothe outside ofthe burner casingand having an exit to the external air v S0 long as'the waterllevel'in the boilerl is above the connectioub, which point maybe selected vatsome Patented July-23,1907,

"I r 'oF'BRIDGEPoRnooNNEo'rioUn ASSIGNoIi; BY MissN I i ASSIGNMENTS,

To STANLEY Moron CARRIAGE ooMPAN Y, -A CORPORATION orMAS ACHUSETTS.

`safe level,ithe circulation of water is thragh the coni v duit,'-asdescribed, and thexfusible plug e eing cooled by thecirculatingwaterremains intact, separating v .the conduit fromthe-outletpipef, When for any reason whatever the water level has fallenbelow the connection b, however, the circulation throughy the' con- Aduitpceases, andthe plug e, being no longer cooled by the watercirculation, is fused through lthe heat of "combustion in the burnerchamber, and the boiler ter supply, so that while the fusible plugprotects the i boiler from the consequences of a stoppage' of its watersupply, the melting of the plug does not incapacitate the boiler fromimmediate furtheruse, but by closing the'valveg, it may be operatedpending the subsequent restoration of the plug.

Since the conduit described is apt to become clogge with foreign metier,I have provided the blow-off valve h in an extension of the dependingpipe-'0,l and the Second blow'off valve 1l in a branch pipe v j,connected with the pipe d and extending laterally outof the burnercasing. The globe cut-off valve k isalso provided to interceptcommunication between the pipe c and the waiter space of the boiler. Byclosing the valve k and opening the valve i', any obstruction in thepipe a is readily removed by the vcompulsory circulation which theboiler pressure enforces through .closing the valve l: and opening thevalve h, any obstruction in the pipes d and d may be similarly removed;while by opening the valve h only, the boiler may be blown off.throughlthe' pipe c, to remove any obstruction therein.V It will thusbe seen that I have provided means for positivley compelling acirculation through'the conduit described to remove any' foreign imatter which mayhave lodged therein.

It sometimes happens that through carelessness or inattention,the'waterV level of a boiler will fall below a given limit during Vtheabsence of the one having charge of such boiler. orderto provideautomatic niean's'forreducing the h'eatgof combustion under suchcircumstances, I preferably employ'thefollowing de l. .l

vices connected to my safetyfdevice ton positively cutY 'o or reducethe'supply of combustible to the hydrocarbon burner vB, when thecfusiblepl ug melts. [At G is the burner regulator controlled by' the boilerpressure for normally .varying the supply of combustible -tothe'yburner.l lhe oil supply pipe is indicated at m,' Fig. 3, and,before entering the' burner,

with a piston q, controlled by the pressure in a pipe 4*,

connected with the outlet pipe f so that when the plug e is melted andthe boiler blows off, the piston q will beorced downward to close thevalve o and. cut o the supply of combustible through the conduit m, thedash pot p maintaining the valve in such closed position after thepressure inthe pipe lhas dropped. The valve o ma;` be readily raisedinto the opening posi tion shown in Fig. 4 by the pin s, projectingthrough a slot in the side of the casing d.

It will be obvious that my invention is in no Wise limited to thespecific details which I have herein shown nor to the arrangement orArelation of parte herein =described, but the same is capable oembodiment -in a great variety oi forms without departing from thespirit thereof. f'

g Claim.

1. A safety device for steam generators comprising a conduit connectedwiththe water space of the boiler and exposed to the heat-of combustionthereof for a portion oi its length, a fusible wall in said exposedconduit portion to normally close an outlet therein, and controllingmeans to cut od the exit through said outlet independently of the saidfusible wall.V

2. safety elce for' steam generators comprising a conduit connected withthe Water space or" the boiler andv exposed to the heat of combustion ofthe boiler-#heating means for a portion of its length, a. )fusible wallin the er.-

closed by said fusible wall' and leading away from said heating means tocause the discharge lof its contents out of the radius of actionthereof.

3.- A safety device for steam generators comprising a conduit connectedwith the Water space of the boiler and exposed to the heat of combustionof the boiler, heating means foi' a portion of its length, a fusiblewall in the exposed conduit portion, an outlet conduit normally closedby said fusible wall and leading away from said heating means to cause'the discharge of its contents out oi the radius of action thereof, andan externally arranged controlling valve for controlling said conduit.

4. A steam boiler having a hydro-carbon burner, a conduit connected withthe water space of the boiler and exposed to the heat of combustion'from said boiler for' a portion of its length, 'a fusible wall in saidconduit portion and means' dependent upon the fusing of said wall forcontrolling the supply of fuel to said burner.

5. A safety device for steam generators comprising a conduit connectedWith-the Water space of the boiler and exposed to the heat of combustionfor a portion of its length, a fusible Wall in said exposed conduitportion, and means for` enforcing a circulation or water under theboiler either through said condnlt or a portion thereof to removeobstacles therein Without interference with said fusible Wall.

(i. A safety device for steam generators comprising a conduit connectedat opposite ends with different levels of the Water space in the boiler,said conduit being exposed Yfor a portion of its length to the heat ofcombustion be! .neath the boiler, a fusible wallv in said exposedconduit portion, an outlet conduit normally closed by said fusible walland leading away from tire boiler heating means, and additional meansfor controlling said outlet conduit.

In testimony whereof, l have signed mynameto this specification, in thepresence of two subscribing witnesses.

v orsono-n E. WHITNEY.

Witnesses: Y

icfrox lmonno'rir, lossen o'. Bioscoop.

'posed conduit portiomi and an outlet conduit normally

